If you ever do it, I want to see the foal! :) :)
I bred two Friesian Sporthorse foals by Sempatico. One was sold in-utero, the other was sold as a weanling. One of them recently went to a USEA FEH (Future Event Horse) competition as a 2YO and had the highest score of all horses presented. You can see both of them on this page if you're interested
FSA foals by Sempatico
Hidden Promise Sporthorses (the farm that had Nico) also has two pinto stallions (a Nico son and grandson) who look interesting. "Adonai" and "King of Kings".
(Hidden Promise Sporthorses, stallions) They also have top notch pedigrees, so there would be no problems registering their offspring.
-Gigha